.swiper {
    position: relative;
    width: 800px;
    height: 460px;
    overflow: hidden;
    margin: 0 auto;
}
.swiper .slide {
    position: absolute;
    left: 0;
}
.swiper .item {
    width: 800px;
    height: 460px;
    float: left;
}
.swiper .item img {
    width: 100%;
    height: 100%;
}
.swiper .btn {
    position: absolute;
    display: flex;
    justify-content: space-between;
    width: 100%;
    top: 50%;
}
.swiper .Btn{
    width: 24px;
    height: 24px;
    background-color: #a1a1a1;
  text-align: center;
    line-height: 24px;
    cursor: pointer;
}
